Filtration and crystallization device and application method of high-purity calcium propionate

Abstract

The invention discloses a filtration and crystallization device for high-purity calcium propionate, which comprises a feed inlet connected to each other, a filter part, an evaporation crystallization part, and a discharge pipe, the filter part includes a bag filter, and the upper end of the bag filter The lower end of the bag filter communicates with the upper end of the plate heat exchanger through the pipeline A; the lower end of the plate heat exchanger communicates with the membrane filter A and one end of the membrane filter B through the pipeline C respectively. , and the other end is connected to the evaporation and crystallization part through the material return pipe. The evaporative crystallization part includes a preheater, an evaporative separation part, and a steam reflux part connected in sequence. The vapor reflux part includes a concentration tank, the bottom of the concentration tank communicates with the evaporative separation part through a pipeline E, and the upper end of the concentration tank communicates with a preheater through a pipeline F. The invention also discloses the use method of the device. The invention recycles the steam generated in the evaporation and crystallization process, saves energy and reduces consumption, greatly improves production efficiency and has good effect.

Description

technical field [0001] The invention relates to the field of chemical manufacturing, in particular to a filtration and crystallization device and a use method of high-purity calcium propionate. Background technique [0002] The appearance of calcium propionate is white crystal or powder. It is a safe and reliable antifungal agent for food and feed approved by the World Health Organization (WHO) and the Food and Agriculture Organization of the United Nations (FAO). Calcium propionate, like other fats, can be absorbed by humans and animals through metabolism and supply the necessary calcium for humans and animals. This advantage is unmatched by other antifungal agents and is considered GRAS. Calcium propionate is an acid-type food preservative. Under acidic conditions, it produces free propionic acid, which has antibacterial effect. Its antibacterial effect is affected by the pH value of the environment. The mold inhibitory effect is the best when the pH value is 5.0; the ant...

AI Technical Summary

Problems solved by technology

[0005] At present, the equipment for large-scale production of calcium propionate at home and abroad is a general enamel reaction kettle. The mature process is roughly as follows: that is, neutralize propionic acid with calcium hydroxide or sodium carbonate, and then evaporate and crystallize, dehydrate, dry, Finished products are obtained through packaging and other processes. However, due to the one-time addition of each reactant during the reaction process, the reaction solubility is not easy to control, and the filtration and evaporation effect is not good, resulting in waste of energy and low yield.

Therefore the existing technology and equipment of this filtering, evaporating and crystallizing calcium propionate need to be improved

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